# Volume between two surfaces?

1. Jun 6, 2006

### Vereinsamt

Volume between two surfaces???

hi guys,

i hope you can help with this, how to find the volume between those surfases:

$$x^2+y^2+z^2=0$$
$$z=\sqrt{x^2+y^2}$$

2. Jun 6, 2006

### StatusX

What have you done so far? By the way, I think that first equation is wrong.

3. Jun 6, 2006

### HallsofIvy

Staff Emeritus
If the first equation is correct, then the answer is very simple:
Since the set of all (x,y,z) satisfying x2+ y2+ z2= 0 is the single point (0,0,0), the volume of the set is 0!